Aircraft



FIG. 1 is a top perspective view of an aircraft showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a left side elevation view thereof, the right side elevation view being a mirror image of that shown. 

The ornamental design for an aircraft, as shown and described. 